12210666 has 32 divisors (see below), whose sum is σ = 27017088. Its totient is φ = 3654720.

The previous prime is 12210659. The next prime is 12210689. The reversal of 12210666 is 66601221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771 + ... + 5001.

It is an arithmetic number, because the mean of its divisors is an integer number (844284).

Almost surely, 2^12210666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12210666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13508544).

12210666 is an abundant number, since it is smaller than the sum of its proper divisors (14806422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12210666 is a wasteful number, since it uses less digits than its factorization.

12210666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12210666 is about 3494.3763392056. The cubic root of 12210666 is about 230.2748195743.

Adding to 12210666 its reverse (66601221), we get a palindrome (78811887).

The spelling of 12210666 in words is "twelve million, two hundred ten thousand, six hundred sixty-six".